“Isn't it possible for an individual to be deeply spiritual without being Christian? Without believing in a Christian doctrine set by any existing sect?”: I am probably not the best to answer this question. In theory, I would say yes. An individual can decide the follow Christ outside the official Churches. It was done before, so a person decide he is a Christian. The problem is the ones who tried were declared Heresies. But, today, we have different sects in Christianity, disagreeing on the Mary Virginity, Holiness of Icons, and marriage of Priest, women, and have different liturgies. All of them describe themselves as Christian. So, an individual can decide he is a Christian for his own reason. And others religions have as well deeply spiritual individuals so, yes, it is possible...
This basically what I said.

“Brenus and The Stranger need to read the dictionary”: Why? What is the definition I am missing?